Discussion: using jTable to create preview

ATUAHENE OPPONG JONES

Member

ATUAHENE OPPONG JONES:1/4/2017 5:36

Please I want to use the jTable in Netbeans to generate records like the image i attached.
thanks for your help.
from Jones.

1/4/2017 5:36

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David Capka Hartinger

Owner

David Capka Hartinger:1/4/2017 9:36

Hello Atuahene, do you mean jTable from Java Swing?

The Swing jTable is a little bit tricky, you need to create a model:

ArrayList<Drug> drugs = ... // Your collection of objects
yourJTable.setModel(new AbstractTableModel() {
            String[] columnNames = {"Drug", "Unit cost", "Quantity", "Total"};
            @Override
            public String getColumnName(int col) { return columnNames[col]; }
            @Override
            public int getRowCount() { return drugs.size(); }
            @Override
            public int getColumnCount() { return columnNames.length; }
            @Override
            public Object getValueAt(int row, int col) {
                Drug drug = drugs.get(row);
                switch (col)
                {
                    case 0:
                        return drug.getName();
                    case 1:
                        return drug.getPrice();
                    case 2:
                        return drug.getQuantity();
                    case 3:
                        return drug.getPrice() * drug.getQuantity();
                }
                return drug;
            }
            @Override
            public boolean isCellEditable(int row, int col) { return false; }
        };
);

However, you should be using JavaFX instead, Swing is an old framework.

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1/4/2017 9:36

You can walk through a storm and feel the wind but you know you are not the wind.

ATUAHENE OPPONG JONES

Member

ATUAHENE OPPONG JONES:1/4/2017 11:10

please am using Swing and not good at JavaFX.
thanks for the help if you can direct the code on swing for me

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1/4/2017 11:10

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David Capka Hartinger

Owner

David Capka Hartinger:1/4/2017 15:31

This is a code for Swing

Edited 1/4/2017 16:31

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1/4/2017 15:31

You can walk through a storm and feel the wind but you know you are not the wind.

ATUAHENE OPPONG JONES

Member

ATUAHENE OPPONG JONES:1/5/2017 16:36

please this is the preview i want to show to respect to the image i sent you

private void cashKeyReleased(java.awt.event.KeyEvent evt) {
double GetTotal = Double.parseDouble(totlw.getText().trim());
double CheckCash = Double.parseDouble(cash.getText().trim());

if (CheckCash >= GetTotal) {
PREV fs=new PREV();

fs.setVisible(true);
fs. printfrm.setText(null);
fs.printfrm.setText("MED ID \tMEDICINE NAME\tQUANTITY\tCOST \n"
+"============================================================================================\n");

for (int i = 0; i < jTable1.getRowCount(); i++) {

fs.printfrm.append(jTable1.getValueAt(i, 0).toString() + " \t" + jTable1.getValueAt(i, 1).toString() +"\t " + jTable1.getValueAt(i, 3).toString() + "\t " + jTable1.getValueAt(i, 4).toString() + "\n"
);

}
fs.printfrm.append("\t ========\n"
+ " TOTAL COST =GH¢ "+ totlw.getText().toString());

} else {
PREV fs=new PREV();
fs.printfrm.setText(null);
}PREV fs=new PREV();

Double ans;
Double cas = Double.parseDouble(cash.getText().trim());
Double total = Double.parseDouble(totlw.getText().trim());
ans = cas - total;
chg.setText(String.valueOf(ans));

// fs.printfrm.append("\t TOTAL COST =GH¢ "+ totlw.getText().toString());
}

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1/5/2017 16:36

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David Capka Hartinger

Owner

David Capka Hartinger:1/6/2017 4:49

And you want to print the table to the console? Or into the file? I thought you just want to fill a jTable with your data.

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1/6/2017 4:49

You can walk through a storm and feel the wind but you know you are not the wind.

ATUAHENE OPPONG JONES

Member

ATUAHENE OPPONG JONES:1/6/2017 5:42

yes to show and print to file.

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1/6/2017 5:42

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ATUAHENE OPPONG JONES

Member

ATUAHENE OPPONG JONES:1/6/2017 10:58

Please help me to print to file

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1/6/2017 10:58

Technology For Life

David Capka Hartinger

Owner

David Capka Hartinger:1/6/2017 13:29

It's easy. Use the BufferedWriter class to do it:

try (BufferedWriter bw = new BufferedWriter(new FileWriter("file.txt")))
{
        bw.write("First line");
        bw.newLine();
        bw.write("Second line");
        bw.newLine();
        bw.write("The last line.");
        bw.newLine();
        bw.flush();
}
catch (Exception e)
{
        System.err.println("Unable to write to the file."); // Or any other error message handling
}

Don't forget to add imports, NetBeans will add them for you if you click on the light-bulb icon

Edited 1/6/2017 13:29

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1/6/2017 13:29

You can walk through a storm and feel the wind but you know you are not the wind.

ATUAHENE OPPONG JONES

Member

ATUAHENE OPPONG JONES:1/10/2017 5:27

Please the first line, second line and third line in your code means what.
Or should I insert my columns there

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1/10/2017 5:27

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David Capka Hartinger

Owner

David Capka Hartinger:1/10/2017 5:35

Yes, you insert your columns there, it's just a sample how to write text into a file.

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1/10/2017 5:35

You can walk through a storm and feel the wind but you know you are not the wind.

User has been banned

Member

User has been banned:5/26/2021 10:51

HI,
Doubt if it's still of interest, but the problem is that TablePrintable is single-use. There's no way to reset it for a second pass.

Calling jTable.getPrintable() a second time gets a fresh TablePrintable, so you need to use the first for counting pages, and the second for actual printing. JAVA Training "JAVA Training ":https://www.sevenmentor.com/…-in-pune.php

Actually, you don't actually need to count the pages. getNumberofPages() can return zero; just end the print loop for when it runs out of pages.

An alternative workaround would be to copy the source of TablePrintable and add a reset method for variable 'last' and the Rectangle values.

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5/26/2021 10:51

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